[Extensions Bindings] Add chrome.runtime.lastError support

extensions/renderer/api_bindings_system.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef EXTENSIONS_RENDERER_API_BINDINGS_SYSTEM_H_
 #define EXTENSIONS_RENDERER_API_BINDINGS_SYSTEM_H_
 
 #include <map>
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "extensions/renderer/api_binding.h"
 #include "extensions/renderer/api_binding_types.h"
 #include "extensions/renderer/api_event_handler.h"
+#include "extensions/renderer/api_last_error.h"
 #include "extensions/renderer/api_request_handler.h"
 #include "extensions/renderer/api_type_reference_map.h"
 
 namespace base {
 class DictionaryValue;
 class ListValue;
 }
 
 namespace extensions {
 class APIRequestHandler;
 
 // A class encompassing the necessary pieces to construct the JS entry points
 // for Extension APIs. Designed to be used on a single thread, but safe between
 // multiple v8::Contexts.
 class APIBindingsSystem {
  public:
   using GetAPISchemaMethod =
       base::Callback<const base::DictionaryValue&(const std::string&)>;
 
   APIBindingsSystem(const binding::RunJSFunction& call_js,
                     const binding::RunJSFunctionSync& call_js_sync,
                     const GetAPISchemaMethod& get_api_schema,
                     const APIBinding::SendRequestMethod& send_request,
                     const APIEventHandler::EventListenersChangedMethod&
-                        event_listeners_changed);
+                        event_listeners_changed,
+                    APILastError last_error);
   ~APIBindingsSystem();
 
   // Returns a new v8::Object representing the api specified by |api_name|.
   v8::Local<v8::Object> CreateAPIInstance(
       const std::string& api_name,
       v8::Local<v8::Context> context,
       v8::Isolate* isolate,
       const APIBinding::AvailabilityCallback& is_available,
       v8::Local<v8::Object>* hooks_interface_out);
 
   // Responds to the request with the given |request_id|, calling the callback
-  // with |response|.
-  void CompleteRequest(int request_id, const base::ListValue& response);
+  // with |response|. If |error| is non-empty, sets the last error.
+  void CompleteRequest(int request_id,
+                       const base::ListValue& response,
+                       const std::string& error);
 
   // Notifies the APIEventHandler to fire the corresponding event, notifying
   // listeners.
   void FireEventInContext(const std::string& event_name,
                           v8::Local<v8::Context> context,
                           const base::ListValue& response);
 
   // Returns the APIBindingHooks object for the given api to allow for
   // registering custom hooks. These must be registered *before* the
   // binding is instantiated.
@@ skipping 41 matching lines @@
   // purposes. Typically, this would send an IPC to the browser to begin the
   // function work.
   APIBinding::SendRequestMethod send_request_;
 
   DISALLOW_COPY_AND_ASSIGN(APIBindingsSystem);
 };
 
 }  // namespace
 
 #endif  // EXTENSIONS_RENDERER_API_BINDINGS_SYSTEM_H_